Mirai White

/ Mi:rai/

Mirai White: ergonomic task chairs for contemporary workspaces

Mirai White by Sitlosophy is the ideal solution for those seeking ergonomic task chairs designed for operational work carried out daily and for long periods. Its design combines a soft, comfortable seat — perfect for extended use — with a polypropylene backrest that ensures strength, easy maintenance, and proper ergonomic support. What makes this version unique is the choice of white-coloured plastic components, giving the chair a bright, fresh and contemporary look, perfect for modern offices, coworking spaces, creative studios or informal work environments.
The Mirai White collection is designed to meet the requirements of EN 1335 certified seating, ensuring performance, safety and long-term durability. From a functional standpoint, the chair can be equipped with advanced mechanisms such as the up-down backrest adjustment or the synchronized mechanism with seat slider, allowing height and inclination adjustment based on the user’s needs. Available in three sizes — including a larger version with an optional headrest — Mirai White can also serve as a semi-executive solution while maintaining a clean and cohesive aesthetic.

Gallery
Destinations of use
Materials and finishes
1.1 Madrid

Weight: ± 230 g/mq
Composition: 100% PP polypropylene F.R.
Martindale: 80.000 cycles

Fire proof class 1IM

MD 515

MD 510

MD 502

MD 514

MD 511

1.2 Cove

Weight: ± 565 g/mq
Composition: 82% PVC – 7% Cotton – 11% Polyester
Martindale: 50.000 cycles

C 539

C 21

C 84

C 98

C 560

2.1 Angel

Weight: ± 228 g/mq
Composition: 100% polypropylene F.R.
Martindale: 100.000 cycles

Fire proof class 1IM

AN 38

AN 30

AN 35

AN 45

AN 20

AN 53

AN 50

AN 41

AN 09

AN 55

AN 39

AN 56

AN 57

AN 46

AN 14

2.2 One

Weight: ± 350 g/mq
Composition: 100% recycled polyester
Martindale: 100.000 cycles

Fire proof class 1IM

ON 4067

ON 1506

ON 7033

ON 2519

ON 3007

ON 3008

ON 7029

ON 7022

ON 4028

ON 6591

ON 6512

ON 6017

ON 8033

2.3 Gazebo

Weight: ± 640 g/mq
Composition: 87,5% Plasticized polyvynilchloride – 12,5% Cotton
Martindale: 50.000 cycles

Fire proof class 1IM

S 4979

S 6

S 151

S 1194

S 1307

S 71

S 792

S 680

S 726

S 1809

S 4947

S 6985

S 4009

S 1955

S 991

2.4 King-flex

Weight: ± 300 g/mq
Composition: 100% Polyester Trevira CS
Martindale: 100.000 cycles

Fire proof class 1IM

KF 1006

KF 4030

KF 4066

KF 4008

KF 4020

KF 8027

KF 3083

KF 3030

KF 7015

KF 6026

KF 7023

KF 6007

KF 8009

KF 9228

KF 8033

3.1 Secret

Weight: ± 540 g/mq
Composition: 76% PVC – 2% PU – 22% PES
Martindale: 60.000 cycles
Features: waterproof, UV rays resistant, suitable for outdoor

Fire proof class 1IM

SC 1013

SC 1002

SC 1008

SC 1011

SC 1024

SC 1007

SC 1005

SC 1020

SC 1009

SC 1018

SC 1021

SC 1006

SC 1015

SC 1012

SC 1017

3.2 Mini

Weight: ± 340 g/mq
Composition: 100% Polyester Trevira CS
Martindale: 100.000 cycles

Fire proof class 1IM

MN 4028

MN 4528

MN 4530

MN 3008

MN 1006

MN 1014

MN 1020

MN 7022

MN 7007

MN 6502

MN 6004

MN 6015

MN 6524

MN 1014

MN 8033

3.3 Chili

100% post-consumer recycled polyester FR
60.000 martindale cycles
Flammability
CLASSE 1 IM – UNI 9175
BS 7176
EN 1021 – 1/2
California TB 117-2013
BS 5852 Crib 5
CA TB 117-2013
NFP 92-503/504/505 M1
DIN 4102 – B1

Fire proof class 1IM

CH 66172

CH 66171

CH 66174

CH 66189

CH 68193

CH 68195

CH 61172

CH 62086

CH 63099

CH 64201

CH 64198

CH 65107

CH 60114

CH 60116

CH 60999

5.1 Step

Weight: ± 340 g/mq
Composition: 100% Trevira CS
Martindale: 100.000 cycles

Fire proof class 1IM

ST 61149

ST 68118

ST 68120

ST 68700

ST 68158

ST 62073

ST 65093

ST 67735

ST 67072

ST 65018

ST 64178

ST 64179

ST 64159

ST 60004

ST 60092

5.2 Go Check

± 310 g/mq
100% Trevira CS
80.000 martindale cycles
Flammability
CLASSE 1 IM – UNI 9175
BS 7176
EN 1021 – 1/2
BS 5852 /2 – CRIB 5
California TB 117

Fire proof class 1IM

G 61138

G 60084

G 60083

G 68169

G 68168

G 68152

G 67071

G 66139

G 66134

G 64183

G 64175

G 64172

G 63080

G 61143

G 61139

8.1 Extrema

Weight: ± 480 g/mq
Composition: 63% PU – 29% COT – 8% PES
Martindale: 150.000 cycles
Features: antibacterial protection

Fire proof class 1IM

X 1450

X 150

X 3650

X 4450

X 1950

X 1250

X 4050

X 2150

X 2750

X 250

X 3250

X 1150

X 950

X 4650

X 2250

8.2 Focus

± 660 g/mq
100% New Zealand wool
100.000 martindale cycles
100% recyclable fabric
Flammability
CLASSE 1 IM – UNI 9175
BS EN 1021 – 1/2
California TB 117-2013 ,
BS 5852 /1,
ASTM E 84 Class 2, ÖNORM A3800-B1-B3825-Q1 UK

Fire proof class 1IM

F 60211

F 60212

F 60999

F 61035

F 61036

F 61040

F 63133

F 64041

F 65032

F 66011

F 66020

F 66022

F 66023

F 68047

F 68048

8.3 Grain

± 615 g/mq
100% Trevira CS
Solid: 92% post-consumer recycled polyester/8% polyester
Duo-coloured: 80% post-consumer recycled polyester/20% polyester
100.000 martindale cycles
Flammability
EN 1021 – 1/2
California TB 117-2013

GR 66231

GR 66234

GR 66236

GR 68259

GR 60303

GR 60320

GR 60328

GR 61248

GR 61251

GR 61253

GR 62123

GR 63117

GR 63118

GR 64250

GR 64251

White

Information

Seat

Multilayer

Backrest

Reinforced polypropylene

Head-rest

Reinforced polypropylene, reclining and height-adjustable

Outer shell

Polypropylene

Padding

Polyurethane foam 4,5/4 cm thick, density 40/30 rc

Armrests

3D in polyprop3D in polypropylene,height adjustable with rotating and sliding black PU pad or height adjustable in black or white polypropyleneylene, height adjustable with rotating and sliding black TPU pad or height adjustable in black or white polypropylene

Mechanism

MEC 8 A Self adjusting synchro with shock proof system. MEC 9 Multi block synchro with shock proof system, side control lever, seat slider on TR version. Height-adjustable backrest by up-down action

Height adjustment

Gas pump (UNI 9084 Certified)

Castors

AR8 Polyamide ø50

Swivel base

B67 Black nylon B69 White nylon

Image
Size
Cod.
Description
118-127
50
70

B530D

Size
118-127
50
70
Cod.

B530D

Description Task armchair, maxi backrest with up-down system, height adjustable headrest, self-adjusting multiblock synchro mechanism, white base and outer shell
118-127
50
70

B530DTR

Size
118-127
50
70
Cod.

B530DTR

Description Task armchair,maxi backrest with up-down system, height adjustable headrest, multi block synchro mechanism, seat slider, white base and outer shell
110-119
50
70

B531D

Size
110-119
50
70
Cod.

B531D

Description Task armchair,maxi backrest with up-down system, self-adjusting multiblock synchro mechanism, white base and outer shell
110-119
50
70

B531DTR

Size
110-119
50
70
Cod.

B531DTR

Description Task armchair,maxi backrest with up-down system, multi block synchro mechanism, seat slider, white base and outer shell
98-107
50
70

B532D

Size
98-107
50
70
Cod.

B532D

Description Task armchair,up-down backrest, self-adjusting multi block synchro mechanism, white base and outer shell
98-107
50
70

B532DTR

Size
98-107
50
70
Cod.

B532DTR

Description Task armchair,up-down backrest, multi block synchro mechanism, seat slider, white base and outer shell
98-107
50

BRB3/S

Size
98-107
50
Cod.

BRB3/S

Description Pair of height-adjustable armrests in white polypropylene

BRB4/S

Size
Cod.

BRB4/S

Description Pair of white polypropylene 3D armrests with sliding and rotating grey PU pad

GS4

Size
Cod.

GS4

Description Pair of black polypropylene brackets with knob for width adjustment of BR 4

A richiesta Normativa europea EN 1335

Download Area
Consult all documents related to the SITLOSOPHY® catalogue including 3D libraries
Video

In this video section, you will find the mechanism tutorials for the Mirai White collection, a range of ergonomic task chairs designed to provide support, comfort, and ease of use in any work setting. Each video clearly explains all available adjustment functions, helping you configure your chair properly and enhance well-being in modern workspaces.

Self-weight synchro mechanism MEC 8A

Synchro mechanism with seat slider MEC-09

Versatility and advanced adjustability: the advantages of Mirai White

The Mirai White collection is created to meet the real needs of modern spaces for operational work, where ergonomics and performance must integrate seamlessly with strong visual identity. Unlike traditional office chairs, Mirai White is built on a balance of clean lines, resistant materials, and high-performance adjustment mechanisms, all while remaining versatile and competitively priced.
At the core of its design is user comfort: the soft seat cushion is engineered to support the body throughout the working day, reducing fatigue and promoting proper posture. The polypropylene backrest ensures solid yet flexible support, enhancing the natural adaptability of the spine. The White version features high-quality light-toned plastics chosen not only for their appearance but also for their durability and easy maintenance.

From a technical perspective, Mirai White offers height and inclination adjustable functions through several mechanism options:

  • Up-down backrest adjustment for personalized lumbar support

  • Synchronized mechanism ensuring smooth and balanced movement between seat and back

  • Seat slider, essential for proper leg support and circulation

  • Optional headrest in the largest version, ideal for breaks or moments requiring extra focus

Thanks to these features, Mirai White fits perfectly within the category of ergonomic task chairs required in modern workplaces, fulfilling European standards for EN 1335 certified seating. The collection is ideal for administrative offices, open spaces, coworking environments, educational facilities and professional studios. Its white aesthetic makes it particularly suitable for bright and minimalist interiors where a fresh, contemporary look is desired.

Mirai White: the ideal choice for modern and informal workspaces

Mirai White represents a perfect balance of ergonomics, design and customization, standing out as one of the most efficient solutions for operational work within the category of EN 1335 certified seating. Its essential lines and white finish make it suitable for offices that focus on a modern, clean and welcoming visual language. This makes it ideal not only for corporate settings but also for more creative environments such as communication agencies, start-ups, technical studios and coworking spaces.

The availability of three different sizes allows Mirai White to adapt to multiple needs: from the compact version perfect for multiple workstations or call centres, to the more equipped intermediate model, up to the largest version with headrest, which can serve as a semi-executive chair. Each configuration maintains the same focus on quality, mechanical performance and durability, resulting in a highly versatile solution.

Mirai White task chairs also stand out for their wide choice of fabrics and upholstery options, allowing a customised aesthetic that pairs the freshness of the white polypropylene backrest with a variety of colours and textures. This flexibility is particularly appreciated by architects and designers who need coordinated moodboards and material combinations.

In summary, for those looking for a functional, durable, customisable and visually coherent seat for modern offices, Mirai White is the natural answer. With its height and inclination adjustable features, compliance with EN 1335 certified seating, and luminous contemporary style, the collection represents a reliable, innovative choice for operational work. A chair that enhances wellbeing and productivity while delivering a refined aesthetic for any professional environment.